Paul-marie nouel and jean rene martini



(No Model.)

PAUL-MARIE NoUEL & J. R. MARTINI.

ENGRAVBRS RULING MAGHINB.

No. 564,636. Patented July 28, 1896.

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wlnesselsh UNITED STATES PATENT OEEIoE."

PAUL-MARIE NOUEL AND JEAN REN MARTINI, OF TROYES, FRANCE.

ENGRAVERS RULlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 564,636, dated July 28, 1896. Application filed October 29, 1895. `Serial No; 567,291. (No model.)

T all whom it may concern.-

- speed than can be done with the machines vupon the tool-holder.

heretofore used and without in any way detracting from the quality of the work.

In machines heretofore used for engraving straight lines it is necessary to draw the guide which carries the tool very slowly, as otherwise such tool will rebound from the surface which is being engraved upon and the lines produced will consequently be uneven. Besides, in nearly all said machines the lifting up of the tool during its return is accomplished by hand, and this further retards the work. lt is true that in some of said machines such lifting up isaccomplished automatically, but the appliances employed for. such purpose complicate the machine materially and in reality are not practicable.

The improvements which form the subject of our invention consist in appliances which permit of producing, while the tool or diamond is moving, an adjustable pressure sufcient to keep such tool from producing these uneven lines, even when the work is being done at a high rate of speed, such appliances being combined with other novel appliances for elevating the tool after each line has been traced and for maintaining it in an elevated position while it is returning to its startingpoint.

In the accompanying drawings, Figure lis a plan view of an entire machine for engraving straight lines constructed according to our invention and embodying the peculiar appliances invented by us. Fig. 2 is a detail view of the spring for regulating the pressure Fig. 3 is a plan view of the tool-holder. Fig. 4 is a section along line l 2 in Fig. 1. Fig. 5 is a ground plan of Fig. 4. Fig. 6 is a section along line 3 4 in Fig. 1. Fig. 7 is a section along line 5 6 in Fig. l; and Fig. 8 is aplan view of Fig. 7, re-

lating to the device for automatically elevating the tool during its return movement.

The base a, Fig. l, serves to direct'and support the carriage b, as well as the slide-rails c c', mounted on said carriage.

The movement of the carriage b upon the base ca is produced by means of the screwspindle d, which turns within the internallythreaded bearings e e', one of which, e, is attached to the extreme end of said base a, and the other upon the carriage b. The free end of screw d might be made to turn in an additional support attached to base a.

Upon the slide-rails c c the tool-carrier,consisting of the slotted bar f, fitted to bar c, and of the small cross-bar f', resting upon the second slide-bar c', is permitted to travel forward and backward. The tool-carrier ff is controlled directly by the hand of the operator with the aid of rod g, and the tool-holder is articulated upon the cross-bar f by means of an axle h', which revolves upon its pointed ends. The tool o must follow the forward and backward movement of the tool-carrier ff when rod g is being moved, and is also capable of displacement in a vertical plane as may be required, owing to the articulation at h of the tool-holder h upon the cross-bar f of the tool-carrier. y

For the purpose of producing upon the diamond o, during its movement, an adjustable pressure suliicient to prevent said tool from producing uneven lines, even when the apparatus is being worked at great speed we employ the following appliances: Upon the cross-bar f of the tool-carrier there is iixed a shaft p, forming an axle around which a sleeve q may revolve. Upon said sleeve q is mounted and xedly secured by means of a screw o a leaf-spring fr. The free end of said spring of, which extends in a horizontal direction, is adapted to come to rest upon the end of a vertical standard t on the tool-holder h. Weights or washers s, which may be of varying number, are adapted to be placed around said standard t, so as to produce upon the tool-carrier an adjustable pressure in addition to the pressure produced upon it by spring fr. For the purpose of producing and regulating the required pressure upon the holder of the diamond-engraver 0 by the spring r and to prevent said diamond from IOO rebounding from the engravingsurface, the screw fu', the head of which is provided with a serrated rim, and which serves to clamp sleeve C7 to axlep, should be loosened. After this the sleeve q, which has thus become free, must be turned sulliciently to impart to spring r such tension as it may be desired to give to it. Finally the sleeve is secured in its new position by tightening screw t" and thereby again clamping it to aXle p.

Operating-rod g, instead of being attached directly to the cross-piece f of the tool-carrier which it is to draw, is attached to a special device constructed in two portions jj', which engage with slide-rail c. rod 7, which may be of much smaller crosssection than that of g on account of its slight length, joins the parts j j to cross-piece f' of Said rod 7, which is capable of sliding with little friction in cross-piece f', has a greater length than the thickness of l suclr cross-piece and terminates in a head 7.

tool-carrier ff.

The auxiliary piece j j carries upon its inner face a linger m and the tool-holder 7zfteri minates in the rear in a tailpiece 7b2, having; a slope h3 placed underneath finger m. The l linger m is rigidly connected with a plate m', in the groove m2 of which a set-screw ms is applied in accordance with the position which I is to be given to it vertically with reference v tool-carrier ff', the adjustment of said sleeve to tool-holder 71,.

lVhen the linger m is above tailpiece 7a2, it -does not engage with the tool-carrier until it slides over the slope 7b3 to its summit, forcing during its travel the tailpiece h2 of the toolholder downward, and consequently forcing the tool o upward.

As the operator draws toward himself the rod g, the rod Z is guided within cross-piece f of tool-carrier ff until its head Z comes to rest against cross-piece f. At that moment finger m is over the tailpiece 71.2, the tool is in its working position, and as the tool-carrier ff is being then drawn along the tool engravesaline. When the rod gis being pushed forward for the purpose of transferring the diamond, rod Z slides within the cross-piece of tool-carrier ff and linger m ascends slope 71,3, forcing the tool into an elevated position. The piece j j comes to rest against cross-piece f', and from this moment the whole device is again conducted forward, the tool .remaining elevated, and so on, for each operation.

Our engravingmachine also contains a counter or mechanism for adjusting the distances between the lines engraved, working automatically as follows: A ratchet-wheel R is mounted upon the screw-spindle c7, and the lateral displacement which it is desired to give to the carriage and thereby to the tool is obtained with the aid of a lever u, which operates the ratchet u and which operates between two movable abutments x in a graduated groove within a piece x2, which is attached to carriage Z1. For instance, abutment 0c is lixedly secured and abutment is placed A secondopposite to the section corresponding with the distance which it is desired to obtain between the parallel lines. After this it is only neces-K sary to im part a forward-and-backward movement to lever u every time that the tool has returned to its point of departure. Finally, the handle y, mounted upon the shaft of screwspindle c7, serves to produce the displacements of the carriage.

The machine for engraving straight lines so constructed and characterized by the devices which permit of giving to the tool an adjustable pressure, and of elevating the tool automatically at the proper time, does work which is perfect in execution, and itV 2. In a machine for engraving straight` lines, in combination with the leaf-spring fr, a sleeve q to which it is attached mounted upon an axle p integral with transverse piece f' of upon the axle being capable of modification by means of screw u', substantially as described above and for the purposes specified.

3. In a machine for engraving straight lines, the combination with tool-holder 7L and a spring of adjustable tension adapted to depress said tool-holder, of a standard t on said tool-holder and weights or washers s of varying number surrounding said standard, substantially as set forth.

4. In a machine for engraving straight lines, the combination with the tool-carrier f, f and tool-holder 71, supported by said carrier and having a tailpiece provided with an inclined plane, as 71,3, of rail c, saddle j, j', sliding upon said rail and provided with an adjustable linger m adapted to pass over the inclined plane and depress said tailpiece, said saddle having a rod 7 with a head 7 and adapted tolpass through an opening in part f/ of the'tool-carrier, and also providedwith operating-rod g, substantially as set forth.

5. The pin 7., sliding within cross-piece f of the tool-carrier ff', provided with a head 7 and secured at its other end to piece jj', in combination with rod g also attached to piece j j', substantially as described and for the purposes specified.

IOC

Signed at Troyes,in the Republic of France, 3

this 11th day of September, A. D. 1895.

PAUL-MARIE NOUEL. JEAN RENE MARTINI. Vitnesses:

AROUEY, BENJ. MUELLER. 

